Discussion
What is the name of a device that converts sound waves to electrical waves ?
Answer: D
The device is a microphone.
A microphone is a transducer that converts the pressure variations of sound waves into a corresponding electrical signal. In a dynamic microphone a diaphragm moves a coil in a magnetic field; in a condenser microphone the diaphragm changes the capacitance of a charged capacitor; piezoelectric and MEMS types are also common.
An amplifier increases the strength of an electrical signal but does not convert sound. A recorder stores signals. A filter passes some frequencies and blocks others. None of them is the sound-to-electrical converter.
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